Business critical applications and the virtual machines hosting them often need the highest possible resiliency to ensure that business operations do not stop in the case of a disaster—either localized or site-wide. To ensure this, the data in use by those applications needs to be spread across two arrays, often in more than one geographic location and importantly be available in both sites, at the same time. To achieve this, some arrays offer synchronous replication that provide the ability to write to the same block storage volume simultaneously while maintaining write-order. This is traditionally called Active-Active replication.
The Pure Storage FlashArray introduced Active-Active replication in the Purity 5.0.0 release.
In VMware vSphere environments, a common use-case for Active-Active replication is with the VMware vSphere High Availability offering. Together, this solution is called VMware vSphere Metro Storage Cluster (vMSC). The combination of these features provider the best possible Recovery Time Objective (RTO) and Recovery Point Objective (RPO) for vSphere environments.
- Purity 5.0.0 or greater
- FlashArray 450